2020-08-19 22:55:56.089 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 483 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:56.205 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 484 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:56.328 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 485 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:56.434 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 486 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:56.552 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 487 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:56.663 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 488 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:56.782 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 489 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:56.891 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 490 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:56.998 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 491 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:57.106 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 492 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:57.213 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 493 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:57.320 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 494 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:57.427 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 495 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:57.535 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 496 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:57.640 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 497 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:57.745 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 498 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:57.852 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 499 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:57.956 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 500 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:58.064 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 501 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:58.172 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 502 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:58.278 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 503 : {abc_001=LEADER_NOT_AVAILABLE}
2020-08-19 22:55:58.385 WARN [-,,,] 35672 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Error while fetching metadata with correlation id 504 : {abc_001=LEADER_NOT_AVAILABLE}Modify the client.id of the kafka cluster. After sending a message, this problem occurs. The solution is to log in to the zookeeper cluster and delete the brokers